The unseasonably chilly weather San Diego County has experienced since Monday will last through Halloween.
Thursday’s overnight temperatures will drop into the mid-50s in coastal areas and the mid-40s generally east of Interstate 15, the National Weather Service said. A few inland spots will be even colder.
A new low pressure system is moving into the Pacific Northwest and will spread clouds and cool air throughout Southern California. But the air will be dry as San Diego finishes a largely rain-free October.
The region also will have gotten through the month without experiencing a major, widespread Santa Ana wind event, which is unusual.
Thursday night’s projected low temperatures:
Julian, 38
Fallbrook, 45
Escondido, 46
El Cajon, 46
San Marcos, 47
Otay Ranch, 49
Borrego Springs, 49
San Ysidro, 51
Oceanside, 53
San Diego, 54
